Prefer C++17 std::{optional,string_view} over boost::{optional,string_ref}

• [2018-07-30 15:15] Validation started with lhcb-tdr-test#233
• [2018-07-31 00:06] Validation started with lhcb-lcg-dev4#602
• [2018-07-31 00:10] Validation started with lhcb-gaudi-head#1947
• [2018-07-31 00:12] Validation started with lhcb-tdr-test#234
• [2018-07-31 00:12] Validation started with lhcb-head#1935
• [2018-07-31 00:13] Validation started with lhcb-lcg-dev3#603
• [2018-07-31 09:06] Validation started with lhcb-head#1935
• [2018-07-31 12:07] Validation started with lhcb-gaudi-merge#550
• [2018-08-01 00:07] Validation started with lhcb-lcg-dev4#603
• [2018-08-01 00:08] Validation started with lhcb-head#1936
• [2018-08-01 00:09] Validation started with lhcb-lcg-dev3#604
• [2018-08-01 00:10] Validation started with lhcb-gaudi-head#1948
• [2018-08-01 00:12] Validation started with lhcb-tdr-test#235

added 1 commit

• 1d9405f4 - prefer std::string_view, std::array over boost::string_ref, std::vector

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merged

mentioned in commit cd941684

mentioned in commit f94c1d7f

mentioned in merge request !1792 (closed)

mentioned in commit 69b617bd